package kr.saeildamil.androidstudty.ch19;

import android.os.Handler;
import android.os.Looper;
import android.os.Message;

public class CalcThread extends Thread {
	Handler mMainHandler;
	Handler mBackHandler;
	
	public CalcThread(Handler mMainHandler) {
		this.mMainHandler = mMainHandler;
	}
	
	@Override
	public void run() {
		super.run();
		Looper.prepare();
		mBackHandler = new Handler(){
			public void handleMessage(Message msg) {
				super.handleMessage(msg);
				Message retMsg = new Message();
				
				switch(msg.what){
				case 0:
					//try{Thread.sleep(200);}catch(Exception e){}
					retMsg.what=0;
					retMsg.arg1 = msg.arg1 * msg.arg1;
					break;
				case 1:
					//try{Thread.sleep(200);}catch(Exception e){}
					retMsg.what =1;
					retMsg.obj = new Double(Math.sqrt(msg.arg1));
					break;
				}
				mMainHandler.sendMessage(retMsg);
			}
		};
		Looper.loop();
	}
}
